Yunan may refer to:

• Ionia, an ancient region of central coastal Anatolia in present-day Turkey
• Yunan County (郁南县), in Guangdong, China
• Yun'an County (云安县), in Guangdong, China
• King Yunan, a character in One Thousand and One Nights
• Yunan, a alternate name for Greece borrowed from the Greek name Ionia used in some Asian languages like the Arabic and Iranic languages.

Yunnan is a province of the People's Republic of China, located in the far southwest of the country. It spans approximately and has a population of 45.7 million (2009). The capital of the province is Kunming, formerly also known as Yunnan. The province borders Vietnam, Laos and Burma.